Door-knob



(Modem B. D. STEVENS.

v Door Knob. f No. 237,923. Patented Feb. 15.1881.

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BENJAMIN D. STEVENS, OF CAMBRIDGE, ASSIGNOR TO CHARLES C. HAR- RINGTON, OF NEWTON, MASSACHUSETTS.

DOOR-KNO B.

SPECIFICATION forming part of Letters Patent No. 237,923, dated February 15, 1881. Application filed August 16, 1880. (ModeL) To all whom it may concern Be it known that I, BENJAMIN D. STEvENs, of Cambridge, in the county of Middlesex and Commonwealth of Massachusetts, have invented a certain Improvement in Door and other Knobs, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature, in which- Figure 1 represents a plan of the veneer, either of celluloid or other material, before molding. Fig. 2 is a cross-section, representing the blank molded to a shape to conform to the exterior or surface of one portion of the core of the knob. Fig. 3 is a plan of a complete knob. Fig. 4 is a horizontal section thereof.

This invention embraces the application of celluloid veneer, or other veneer of like character, to door and other knobs.

A is the veneer. For ordinary door-handles, preferably, it is made in two parts, a, a, which are molded under heat and pressure to the conformation of the surface of the cores a 0L3.

The cores may be made of wood, plaster-ofparis, paper-pulp, papier-mach, or of any other desirable material, and each part is fastened to a plate, a ,'of tin, zinc, or other metal. When a moldable material is employed I prepare the metallic plates by punching or cutting V or other shaped starts or sections therein, which are turned upward, as represented in Fig. 4, and the moldable material is compressed around them upon the plate, and held thereby firmly to it. The veneer having been shaped as above described is cemented to the surface of the cores audits edge folded inwardly thereon. The two cores are then brought together, so that the metallic plates are almost brought in contact. The hollow spindle B is inserted into the hole I) in one of the cores, and melted lead or solder poured therein to fill the chamber between the metallic plates and the lower part of the spindle, thereby firmly fastening the two cores to each other and to the spindle.

If desired, aring, C, of metal or other suitable material, may be introduced between the two parts of the'core, as represented in Fig. 4,

and the projecting portions 0 serve to cover.

and conceal the seam or joint between the two cores.

Of course I do not confine myself to the method of applying the veneer, but may form the core in one or two parts first, and then apply the celluloid upon the entire handle, or as large a portion thereof as possible, arranging the seam or joint, when two or more pieces are used, upon the surface of the handle not exposed to sight.

In making knobs of any other shape than that represented, substantially the same method of construction is pursued-that is, the handle is made of some cheap material and is covered by a veneer of celluloid, which is united thereto by cement, and which may have its line of union or seam covered and concealed by a metallic or other border. A celluloid veneer is very hard and tough, wears well, takes a line polish, and can be colored to imitate any of the natural stones or marbles, or to any desirable tint, and, as the construction is cheap as well, the advantages of this invention are obvious.

It is obvious that the celluloid veneer may be obtained by coating the knob with celluloid in a plastic state and shapingit thereon under pressure.

of course the ring C may be made of celluloid or any other moldable material, and it may be inserted between the two parts of the knob, as represented in Fig. 4, or it may be applied to the circumference of the knob for the purpose of ornamentation or for the purpose of concealing a joint.

Having thus fully described my invention,

Iclaim and desire to secure by Letters Patent of the United States- A 1. As an improved article of manufacture, a door or otherknob consisting of a core of wood, papier-mache, paper-pulp, plaster-ofparis, or other cheap material, a spindle, B, fastened to the core, and a veneer of celluloid shaped to the contour of the core under heat and pressure, and cemented or otherwise attached thereto.

2. The combinationof the plate a, having the starts or sections formed thereon, as described, with a core of moldable material united thereto under pressure, whereby the starts are embedded in the material and assist in fastening it to the plate, substantially as and for the purposes described.

Witnesses BENJN. D. STEVENS.

THos. WM. CLARKE, A. J. OETTINGER. 

